This is the rubric I use to grade all summative assessments in classes where I am executing skills based learning. I use three categories: mathematical reasoning/communication, problem solving, and producing quality work. 45% of a student's grade is problem solving, 10% is producing quality work, and 45% is communication, but feel free to do whatever you feel works for your class. I change these percents throughout the year, depending on the unit. Communication is assessed through writing and pr